1. From the Department of Oral Health and Diagnostic Sciences, University of Connecticut Health Center, Farmington (M.S.T.); and the Periodontology Unit, Eastman Dental Institute and Hospital, University College London (F.D., L.N., M.P., J.S.); Center for Clinical Pharmacology, University College London (A.D., A.D.H., P.V.); and the Vascular Physiology Unit, University College London and Great Ormond Street Hospital for Sick Children (A.D., C.S., J.D.) — all in London.